Why should more people ride a bicycle to work?

“I’ve always liked riding my bike. It saves a little money, but it’s all ancillary to just riding. You have to pay for bike tires, maintenance. For gas, it’s about a gallon a day. So about $100 a month. It’s not a substantial savings, but I’m much healthier.” - Jeff Ruby, Fairfax, works at Humphreys Engineer Center